Quote: Then it becomes clear that this is hyperbole. Translating that to a game may be difficult unless you have good voice actors that can make a clear distinction between humorous exaggeration and the normal to serious side of the character. It loses its usefulness no matter how it is done though if its over used to the point where it becomes hard to see the real character under the joke scenes.When you put it that way, it does seem more irritating. I certainly don't like the thought of a character where one side is this chowderhead personality that damages the reputation of an otherwise cool second form. However, the "mild-mannered/superhuman" relationship has a great rep. (Clark Kent/Superman) I guess it's just a question of how much the personalities of each side contrast.
In the interest of continuing the discussion of what's "cheesy", I'm surprised no one has yet mentioned deus ex machina. I find this to be sinful even in comedies with otherwise brilliant writing. Futurama was guilty of this on a few occasions. Even if it isn't that extreme, I have played games where story elements come in a little too quickly. They don't immediately solve the hero's problem, but they are solutions that you are suddenly expected to pursue. Sometimes the conversation before this happens goes something like this:
Hero: We seek the Jeweled Maiden Talisman!
Old Man: You must first find the Newt of Wisdom.
Hero: *gasp* I thought that was just a legend!
Old Man: No. *spins globe and points at the most distant continent* Go here.
Too many people get away with this. Please don't jerk me around! I feel if you must introduce a story element later, imply it first in some fashion. Make the player or view feel there's something missing, and you are about to find out what. Metroid gave me this feeling when there was a sudden increase in doors I couldn't open.